function getTime(){
  const time = new Date().getHours()
  if(time>=5&&time<9) return "早上好"
  if(time>=9&&time<12) return "中午好"
  if(time>=12&&time<18) return "下午好"
  if(time>=18||time<5) return "晚上好"
}
module.exports={
  getTime
}